Spirax-Sarco 54529C Thermodynamic Trap

The Spirax-Sarco 54529C is a high-performance TD52 thermodynamic steam trap designed specifically for the rigorous demands of 3/8" steam main drainage, tracer lines, and process equipment. Constructed with a robust stainless steel body (ASTM A743 Grade CA40F), this disc-style trap utilizes the phase-change velocity principle to ensure positive condensate discharge without the risk of air binding. This model is engineered to handle superheated steam applications and is essentially immune to water hammer and vibration, making it a reliable choice for high-pressure systems up to 600 psig.

For field technicians, the TD52-3/8" thermodynamic trap offers an electroless nickel-plated finish for superior corrosion resistance in outdoor or freezing environments. The single moving part—a hardened stainless steel disc—ensures minimal maintenance overhead. It operates efficiently with a maximum operating pressure of 600 psi at 800°F and requires a minimum inlet pressure of 3.5 psig for stable cycling. When installing, prioritize a horizontal orientation to optimize the life of the integral seat design and ensure the backpressure does not exceed 80% of the inlet pressure to prevent failure to close.

• Hardened Stainless Steel Disc: Provides a clean, blast-discharge cycle that resists wear from high-velocity steam.
• Corrosion Resistant: Electroless nickel plating and full stainless steel construction protect against aggressive condensate.
• Freeze-Proof Design: Ideal for outdoor installation; the vertical downward discharge configuration prevents condensate backup and freezing.
• In-Line Maintainability: The cap-and-disc assembly allows for complete inspection and reconditioning without removing the trap from the piping.
• Extreme Durability: Unaffected by water hammer or superheats, ensuring uptime in volatile industrial steam systems.

What is the maximum backpressure for the TD52?
To ensure the trap shuts correctly, the backpressure should never exceed 80% of the inlet pressure. High backpressure reduces the pressure differential necessary for the thermodynamic disc to seat.

Can this trap be used on superheated steam lines?
Yes, the thermodynamic disc trap is specifically suited for superheated applications where other trap types might fail due to the lack of a water seal.

Is a strainer required for the 3/8" TD52?
While the 54529C is robust, installing a 20-mesh Y-strainer upstream is standard trade practice to prevent scale and debris from scoring the hardened seat and disc.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.